Kyoritsu

What Kyoritsu does

Kyoritsu Heat Techno Co., Ltd. is a Japanese privately-held metal heat treatment service provider founded in July 1960, headquartered in Yao City, Osaka Prefecture. The company operates a network of six production factories at its headquarters site plus the Kashiwara Factory and Kashiwara No.2 Factory (acquired in 2019 from Tokken Thermotech Co., Ltd.), offering a comprehensive portfolio of fourteen core heat treatment processes — including quenching and tempering, carburizing, carbonitriding, gas nitrocarburizing (gas soft nitriding), vacuum heat treatment, normalizing, annealing, thermal refining, stress relief annealing, solution treatment, austempering, blackening, shot blast finishing, and correction/straightening. Its infrastructure spans batch furnaces, continuous furnaces, vacuum furnaces, pit furnaces, austempering equipment, sub-zero treatment units (down to -120°C using liquid nitrogen), and an automatic continuous batch furnace line of eleven computer-controlled units, enabling high-reproducibility processing of parts ranging from small precision components to large shafts.

The company operates a one-stop service model through its group structure: Kyoritsu Heat Techno performs the heat treatment, Kyoritsu Shot Blast Co., Ltd. (spun off 1986) handles surface finishing, and Kyoritsu Transport Co., Ltd. (spun off 2000) manages pickup and delivery logistics. The holding company Kyoritsu Co., Ltd. (established 2014) sits above these entities. Customers send metal components to Kyoritsu's factories for processing, and the group returns finished parts. Revenue is generated per job/order based on treatment type, material, weight, volume, and complexity — no subscription or licensing component exists.

Kyoritsu serves enterprise B2B customers primarily in the automotive, construction machinery, industrial machinery, agricultural machinery, and construction sectors, with a designated-factory relationship with major Japanese OEMs including Toyota Motor, Denso, Mazda, Nissan, Hino Motors, Mitsubishi Motors, Honda, Daihatsu, Isuzu, Komatsu, Hitachi Construction Machinery, Caterpillar Japan, Kubota, NTN, JTEKT, KYB, IHI Shibaura, and Saga Iron Works. The company holds ISO 9001:2000 (since November 2001), ISO 14001:2004 (since May 2006), and JIS Mark (since March 1983, renewed 2008) certifications, and received the Osaka Manufacturing Excellence Award in 2010. Geographically, operations are concentrated in the Kansai region of Japan, with no public indication of international expansion.

Name

Kyoritsu

Legal name

株式会社共立ヒートテクノ

Website

https://kyoritsu-ht.jp

Company type

Private

Founded year

1960

Operating status

Operating

Headcount range

11–50 employees

Short description

Kyoritsu Heat Techno is a Japanese privately-held metal heat treatment service provider operating six factories in Osaka, serving automotive and industrial machinery OEMs (Toyota, Honda, Komatsu, Kubota) with a one-stop group offering spanning heat treatment, shot blasting, and logistics.

Ownership category

akta.pro rank

Product category

Metal Heat Treatment Services

NAICS

Metal Heat Treating (332811), Industrial Process Furnace and Oven Manufacturing (333994), Coating, Engraving, Heat Treating, and Allied Activities (3328)

SIC

Industrial Process Furnaces & Ovens (3567)

akta.pro primary industry

Industrial Furnaces, Kilns & Thermal Processing Equipment (IMAHAEAE)

Keywords

• Metal heat treatment
• Industrial heat treatment
• Surface finishing services
• Shot blast processing
• Heat treatment subcontracting

Headquarters

HQ city

Sagamihara

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Supply Chain

Revenue model

1. Metal Heat Treatment Processing Services: Kyoritsu provides metal heat treatment processing services on a job-work basis for industrial customers. Customers send metal components for heat treatment and the company returns the processed parts. Pricing is based on the type of treatment, material, weight, volume, and complexity. Revenue is generated per job/order with no subscription component.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels3 records

Core offering

Kyoritsu Heat Techno provides contract metal heat treatment processing services on a job-work basis for industrial B2B customers, encompassing quenching and tempering, carburizing, carbonitriding, gas nitrocarburizing, vacuum heat treatment, normalizing, annealing, thermal refining, stress relief annealing, solution treatment, austempering, blackening, shot blast, and correction/straightening. The Kyoritsu group, comprising Kyoritsu Heat Techno, Kyoritsu Shot Blast, and Kyoritsu Transport, delivers a one-stop service from customer pickup through processing, inspection, and final delivery.

Product overview

Kyoritsu Heat Techno (株式会社共立ヒートテクノ) operates as a metal heat treatment service provider offering a comprehensive portfolio of heat treatment and finishing services. The core offerings include quenching and tempering, carburizing, carbonitriding, gas nitrocarburizing, vacuum heat treatment, normalizing, annealing, thermal refining, stress relief annealing, solution treatment, austempering, blackening, shot blast, and correction/straightening services. These services are delivered through the company's extensive manufacturing facilities (Head Office with 6 factories plus Kashiwara factory with additional sites), while the group structure includes Kyoritsu Shot Blast for finishing services and Kyoritsu Transport for logistics, enabling a one-stop solution from pickup through delivery. The company serves diverse industries including automotive, construction machinery, industrial machinery, agricultural machinery, and construction.

Differentiator

Problem solved

Functional benefit

Products and services

• Quenching and Tempering (焼入焼戻し) Heat treatment service that heats steel above transformation temperature, rapidly cools with water/oil/salt to create hard martensite, then reheats to achieve required tensile strength and toughness. Sold to industrial manufacturers requiring high-strength, tough components.
• Carburizing (浸炭) Surface hardening service that permeates carbon into steel surface in carbon-rich gas atmosphere, then rapidly cools to create hard, wear-resistant surface with soft, tough interior. Used for gears and shafts requiring strength and wear resistance.
• Carbonitriding (浸炭窒化) Surface hardening service that permeates both nitrogen and carbon into steel surface, then quenches to achieve surface hardness. Applicable to low-carbon steels that cannot be carburized, with less deformation due to lower processing temperatures.
• Gas Nitrocarburizing / Gas Soft Nitriding (ガス軟窒化) Surface hardening service that forms carbonitride and nitride layers on steel surface using carburizing gas and NH3 gas atmosphere, improving wear resistance, fatigue resistance, and seizure resistance with minimal distortion.
• Vacuum Heat Treatment (真空熱処理) Heat treatment service performed in a vacuum environment that prevents surface oxidation and decarburization, maintaining original surface brightness. Includes vacuum solution treatment, vacuum quenching, and vacuum annealing, primarily used for stainless steel.
• Normalizing (焼ならし) Heat treatment service that heats steel above transformation temperature and air-cools to refine grain structure and improve mechanical properties, removing effects of prior forging or rolling processes.
• Annealing (焼なまし) Heat treatment service that heats steel above transformation temperature and slowly cools within the equipment to adjust grain structure and improve machinability through softening.
• Thermal Refining (調質) Heat treatment service that reheats quenched steel at high temperature to create sorbite or troostite structure, improving strength, toughness, and machinability. Also used as pre-treatment for induction hardening and nitriding.
• Stress Relief Annealing (応力除去焼なまし) Heat treatment service that removes residual stress and grain size unevenness caused by cold working or welding by heating below transformation temperature.
• Solution Treatment (溶体化処理) Heat treatment service for aluminum and other non-ferrous metals that heats and rapidly cools to create supersaturated solid solution, enabling subsequent aging treatment to achieve superior mechanical properties.
• Austempering (オーステンパー) Quenching service that heats steel to stable austenite temperature, then cools to 300–500°C for isothermal holding using salt bath to obtain bainite structure, resulting in minimal deformation, cracking, and high toughness and durability.
• Blackening Process (黒化処理) Surface treatment service that forms black iron oxide (Fe3O4) film on product surface using combustion burner exhaust gas during tempering, followed by anti-rust oil penetration for enhanced corrosion resistance and appearance.
• Shot Blast (ショットブラスト) Finishing service that removes oxide scale, discoloration, and burrs from heat-treated surfaces using high-velocity steel grit projection, cleaning surfaces for subsequent processing. Provided via Kyoritsu Shot Blast Co., Ltd. as part of the integrated one-stop service offering.
• Correction/Straightening (矯正) Correction service that measures distortion using dial gauges and specialized gauges, then applies physical pressure with press or roller straightening machines to meet blueprint tolerances.
• Pickup and Delivery Logistics (Kyoritsu Transport Co., Ltd. / 共立運輸株式会社) Logistics service provided by subsidiary Kyoritsu Transport Co., Ltd. handling pickup and delivery of metal components, enabling the Kyoritsu group's one-stop service from customer pickup through to final delivery.
• Gas Nitrocarburizing Line Production Service (ガス軟窒化ライン) Production line service comprising 4 batch-type nitriding furnaces, 1 pit-type nitriding furnace, and 2 vacuum cleaning machines, enabling flexible response to product shapes and processing volumes with automatic temperature, time, and atmosphere control.
• Automatic Continuous Batch Furnace Line Production Service (自動連続バッチ炉ライン) Computer-controlled production line service with 11 units including carburizing quench furnace, tempering furnace, and vacuum degreasing machine, providing high reproducibility and serving diverse customer needs.
• Large Continuous Quench-Temper Furnace Production Service (大型連続焼入焼戻し炉) Continuous production service capable of large-volume manufacturing of large parts with high-quality finish, short delivery times, and multi-material compatibility.
• Three-Chamber Vacuum Furnace Production Service (三室型真空炉) Vacuum furnace production service with program-controlled temperature precision using mofur-sameth heater, featuring separate purge, heating, and cooling zones for high productivity.
• Sub-Zero Treatment Production Service (サブゼロ処理装置) Deep cryogenic treatment service using liquid nitrogen cooling capable of temperatures down to -120°C to promote martensite transformation, improving hardness and preventing age-related deformation.

Named customers18 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Eight partnerships are on record, tiered parent/holding, core group and minor.

• 株式会社キョウリツ (Kyoritsu Co., Ltd.)parent/holdingOthersEstablished in 1996 as the holding company. Kyoritsu Co., Ltd. holds the group structure under which Kyoritsu Heat Techno operates. The holding company has capital of 30 million yen and shareholder capital of 112.79 million yen. Represents the corporate parent entity.
• 共立ショットブラスト株式会社 (Kyoritsu Shot Blast Co., Ltd.)core groupStrategic or Co-development PartnerFounded in May 1986 as a spin-off from Kyoritsu's shot processing division. Capital of 10 million yen. Located at 大阪府八尾市竹渕西2丁目50番地. Provides shot blast and surface finishing services as part of Kyoritsu's one-stop heat treatment offering.
• 共立運輸株式会社 (Kyoritsu Transport Co., Ltd.)core groupStrategic or Co-development PartnerEstablished in June 2000 by spinning off the transportation division of Kyoritsu Metal Heat Treatment. Capital of 10 million yen. Located at 大阪府八尾市竹渕西4丁目25番地. Operates general freight trucking, freight transport handling, auto maintenance, warehouse business, and damage insurance agency. Provides pickup and delivery services that enable Kyoritsu's one-stop service model.
• 三菱UFJ銀行 平野南口支行 (MUFG Bank Hirano Minami-guchi Branch)minorOthersPrimary transaction bank for Kyoritsu Heat Techno.
• みずほ銀行 阿倍野橋支行 (Mizuho Bank Abenobashi Branch)minorOthersTransaction bank for Kyoritsu Heat Techno.
• 日本政策金融公庫 東大阪支店 (Japan Finance Corporation East Osaka Branch)minorOthersGovernment-backed financial institution providing financing support to Kyoritsu Heat Techno.
• 日本金属熱処理工業会 (Japan Metal Heat Treatment Industry Association)minorOthersIndustry association. Kyoritsu Heat Techno is a member, along with other metal heat treatment companies in Japan.
• 西部金属熱処理工業協同組合 (Western Japan Metal Heat Treatment Industrial Cooperative)minorOthersRegional industry cooperative in western Japan. Kyoritsu Heat Techno is a member.

Scale indicators5 records

Recent moves10 records

Direct peers

• Bodycote plc: World's largest commercial heat treatment services provider, operating across dozens of countries including Japan. Directly comparable to Kyoritsu as a contract metal heat treatment specialist serving automotive and industrial customers.
• Neturen Co., Ltd. (高周波熱錬): Japanese specialist in induction heat treatment, surface modification, and steel wire products. Directly comparable as a metal heat treatment specialist serving Japanese automotive and construction equipment OEMs.
• Paulo Products Company: Major US-based contract heat treatment and brazing services provider serving automotive, heavy equipment, and industrial customers. Closely comparable business model — multi-process, multi-factory contract heat treatment.
• Tokken Thermotech (東研サーモテック): Japanese contract heat treatment company that previously owned the Kashihara factory Kyoritsu acquired in 2019. Operates in adjacent Osaka/Kansai region with overlapping automotive and industrial customer base.

Emerging players

• DOWA Holdings: Japanese diversified materials and environmental services company with heat treatment and surface treatment operations. Partial overlap with Kyoritsu in metal processing services for industrial customers.
• TOCALO Co., Ltd. (東カロ): Japanese specialist in surface treatment, thermal spray, and ceramic coating services. Comparable customer base (automotive, industrial machinery) with adjacent surface-finishing capabilities.
• Nippon Parkerizing (日本パーカライジング): Japan's leading surface treatment company providing rust prevention, paint, and metal finishing services. Adjacent to Kyoritsu's shot blast and blackening offerings, serving overlapping automotive and industrial customers.

Broad incumbents

• NIPPON STEEL Corporation: Japan's largest steel producer and a critical upstream supplier to Kyoritsu's customer base. A broad incumbent whose customers and product roadmap shape demand for downstream heat treatment services.
• Daido Steel (大同特殊鋼): Major Japanese specialty steel manufacturer with significant heat treatment capability in-house. Broader vertical scope than Kyoritsu but overlapping in the metal heat treatment value chain serving Japanese OEMs.

Market position

Strengths5 records

Weaknesses5 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Kyoritsu